You still did not mention more details like the purpose of the AMP , only at Home , or in a Band , both , on Gigs
Also it seems like you are not very clear about for what sound you wanna go for , even as pedalplattfrom your AMP will always define the main character of your sound. Befor buying an AMP most people do know what they wanna achieve, for exsample I did want to have the typical Fender clean sounds and Fender reverb , thats why I did choose a Fender , and the Hod Rod because it can be loud enough in a Band and small Gigs and because its a bit cheaper then a deluxe reverb, also when the hod rod is not a very good long lasting AMP , I am very happy with this AMP.
But maybe you will find your Sound you wanna achieve, when you try out some AMPs.
Yes like I said the AC10 is in your budget , but not really a pedal plattform, cranked it might be too loud to use it at Home , depends on your volume barrier at home.
The Katana is good at Home, it takes pedals but is also not really a pedalplattform, its sounds good, but still it sounds a bit digital and lifeless compared to tube AMPs, you will find out when testing AMPs, the Katana Artist (does cost a bit more then you budget I think) you get some extras where its easier to record music , then you do not need to mic up the AMP for recording.
And listen also to jimmarchi1 he got much more knowledge about AMPs then I do, specially technical.
He is very right when saying Use YOUR stuff and see if you can tweak everything to make your ears happy at volume levels you will realistically use day in day out.
When you tryout Used AMPs with your pedals you might find a good AMP as pedalplattfrom,
but also read about the risks we mentioned , when buying a used AMP, when its possible check the AMP inside, be careful of high voltage even unpluged do not touch inside an AMP - never.
I can not say something about EVH AMPs never saw and never had one in person, sorry.
For a really great pedalplattform I would save some more money, but maybe you will find an great AMP in your current budget when testing them, or you will see then you might wanna save some more money.