Lots to look at but Paradigm is a good start for a few reasons. 1. Decent balance for HT, Gaming and music. A solid all-performer. 2. Most are easy to drive, no need to invest heavily in amps, etc. 3. There are lots of them out there, driving down the used prices. 4. Easy to find a matching center if you prefer to do so.
Look around for Paradigm Studio Series, 20, 40 and 60. If considering towers like the 60, best to look locally since shipping tower speakers can be pricey. Bookshelfs like the 20 are easy to ship, $50 to $75 coast to coast.
Depending on the version, any of the Studo series will fit your budget.