Baschti

Honestly... I'd say it depends on what your budget is first. I'd always recommend a separate audio amp plus some decent speakers to go with it.
 
Smallest I can recommend is probably two of the Cambridge audio minx min 22, plus their Cambridge audio one pre-amp to go with them. Still got to buy different pieces rather than a whole system at once but I'm sure it'll do you better for upgrade-ability and quality.

Get your wife a pair of Hello Kitty headphones and a pair of proper open-backs for yourself. 
 
Wish someone would sell these: https://www.visaton.de/index.php/en/products/3-way-speakers/vox-80
Tiny speakers designed for such occasions. Or you know...if your wife can handle some DIY saw-glue-hammering-painting you could make these yourself. 

I’ve had two pairs of Logitech speakers and they have both been great. I’m assuming your wife won’t be down for a giant subwoofer so I would go with something like the Logitech MX Sound.

https://www.newegg.com/Product/Product.aspx?Item=N82E16824009769
 
This is what i would choose, if you go any bigger on 1440p the dpi is going to not look good any i guarantee you will be unhappy if you do anything other than gaming on it.

I would still lean toward EVGA, my reason are as follows. 
 
EVGA much better customer service support and RMA experience.
EVGA card is capable with EK Vector Water Block for potential Water cooling support. The Gigabyte will not fit that block. Not saying there isn't a block that might but the EK Vector won't fit that card.
Gigabyte does have a 4 year warranty as long as you register online apposed to 3 year with EVGA so that would be up to how long you think you would keep the card before an upgrade.
Even though the gigabyte card uses 3 fans they have to spin up pretty good to keep up with the heat from TU106A die. It would only be slightly quieter during load over the EVGA.
 
In my opinion I would go with the EVGA card because of those facts, also I don't mind extra noise myself I tend to run very aggressive fan curves for my case fans. 
 
Either card would be a good bet but i have heard that the Gigabyte cards don't OC all that well some i have seen they can only get up to 60Mhz offset on the core before they are flagged with reliable voltage issue and the card backs off some. 

https://www.newegg.com/Product/Product.aspx?Item=N82E16824009769
 
https://www.newegg.com/Product/Product.aspx?Item=N82E16824160315
 
https://www.newegg.com/Product/Product.aspx?Item=N82E16824011234

Here are my benchmarks in Unigine Valley 1080p Maxed out and 4K Maxed out. 

Normally I have the card water cooled but my pump went out last week and waiting on another to come in.

This Evga card has the same core boost clock of 1710 as a Founders Edition Card. My card without touching the OC on the core boosts up to 1975Mhz with the GPU Boost built in.

PCPartPicker part list / Price breakdown by merchant
CPU: AMD - Ryzen 5 2600 3.4 GHz 6-Core Processor  (€156.89 @ Amazon Deutschland) 
Motherboard: ASRock - B450M Steel Legend Micro ATX AM4 Motherboard  (€100.89 @ Alternate) 
Memory: Crucial - Ballistix Sport LT 16 GB (2 x 8 GB) DDR4-3000 Memory  (€83.90 @ Amazon Deutschland) 
Storage: Crucial - MX500 500 GB 2.5" Solid State Drive  (€68.90 @ Amazon Deutschland) 
Storage: Toshiba - P300 2 TB 3.5" 7200RPM Internal Hard Drive  (€61.90 @ Caseking) 
Video Card: Sapphire - Radeon RX VEGA 64 8 GB NITRO+ Video Card  (€437.99 @ Mindfactory) 
Case: be quiet! - Silent Base 801 | Silver ATX Mid Tower Case  (€119.63 @ Mindfactory) 
Power Supply: be quiet! - Pure Power 11 CM 600 W 80+ Gold Certified Semi-Modular ATX Power Supply  (€81.99 @ Amazon Deutschland) 
Monitor: AOC - AG241QX 23.8" 2560x1440 144 Hz Monitor  (€340.45 @ Amazon Deutschland) 
Total: €1452.54
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-04-08 10:07 CEST+0200
 
Well i assumed with monitor. Even then its below budget.
 
RX Vega 64 Nitro+ is a way better pickup atm in germany than aby of the 2070s. 

I would get just a regular 2070 and OC it yourself, EVGA 2070 XC Gaming are good cards, I have a 30% OC on mine.