UPS for Office

[ChillaKilla]

Hey there,
No idea if thats the right sub-forum but ill throw it in here, if its wrong i would kindly ask someone if he/she can move it

I have a relativly small Business with 2 PCs in my Office, one is for 3D (1)  work and one for Accounting (2) and the likes.

PC1 has a power draw of about 150W idle and up to 700W under load, and PC2 is relativly small and reaches about 300W under Load.
Together with that i have two Monitors, 1 with about 60W and the other with up to 120W (stated in Manual), a FritzBox 7490 (upt to 27W) and a small Netgear (I think 8 Ports) switch of wich i dont know the power draw.

All togehter its a load of around 1300W and 6 plugs if all were to be under load at the same time, wich shouldnt' happen, but it could

When it comes to UPSs im a noob honeslty,
I would like at least 2 Surge Protection outlets, more would be great (had a Lightning stike 2 years ago and it fried half the office) and about a 15 minutes of battery runtime (withe an audio alarm of some sort if it switches to battery mode)
if possible 8 outletswould be nice.
I live in germany, we have 230V AC form our Outlets.

Do you know of any good UPS i could get maybe on the cheaper side.
If these cost way to much, maybe an alternate one for the PCs alone.
The buisness is still new, and i cant blast 3k on stuff like that unfortunatly right now^^

Greetings and thanks in advance!