CanadianJet

From experience and asking this question myself in past builds, it is cleaner to do a fresh install of windows on the new SSD.
 

It’s fine. Laptops run hot, it’s what they do.
unless it’s pushing over 100cits going to be fine

I am a high-end home designer in the Fraser Valley, and I deal in 3D renderings and modelling of those homes. This includes VR walkthroughs of the home. I have designed theatre rooms and media rooms in the past as part of large houses. If this is a service that Linus is interested in, I'd love to offer my services!

Is your mouse wireless/have you tried a different mouse? Storage shouldn't be the cause of mouse input delay. The other thing I can think of would be your internet connection if you are playing online.

As genwyn said, it depends on price.
 
That would be more than fine as an HTPC with an SSD, thats all you'd need to really change.

That's not a good price. Core 2 Duo systems can be had for free these days. I have a ThinkCentre M57p, and it struggles with 1080p video. 720p is decent, but not full HD. I would only get those if they were $10 each, and paying more for the optical burners and DVI adapter isn't necessary.

No need to pay extra for the optical readers. That is a good price for those models, lenovos hold their value well due to build quality. I'd buy em.