I'm surprised I haven't seen Ampeg mentioned. I have always really liked the B-15, though it's nowhere near the $700 price. (From what I have seen lately, the prices for B-15s, especially the older tube versions, are pretty much insane.) But Ampeg does have a couple of combo amps in the price range. There is a 1-15 200W and a 2-10 that is 150W (if I recall correctly.) I would think these would definitely be worth looking into. I have played through a couple of the newer Ampeg amps, but only for a quick test drive in a store. They sounded pretty good from what I recall. However, I don't know how quality is for Ampeg these days. Anybody else have info on that?
On an only partly related note, some years ago, I played an Acoustic 370 head w/2 Kustom 200 speaker cabinets (I won't mention how many years ago...). In case nobody is familiar with the Kustom 200 bass cabinets, they are 2-15 ported cabinets. The Acoustic 370 head is about 275 Watts RMS. My main reason for mentioning this is that I saw above somewhere a couple mentioned 'only 350 watts' or perhaps 'only' 200 watts would be enough. When I was playing with a moderately loud top-40 band I never had this amp over 3, with no bass into the PA. And this was with crappy CTS speakers. Have amp manufacturers gone completely away from RMS ratings? Or am I missing something with the crazy high wattage amps? By the way, this Acoustic/Kustom setup had mostly 2 advantages: it was loud and could put out more bottom end that you could possibly want.
Regarding Acoustic bass amps in general, I have played on a couple of the newer ones. Just my opinion, of course, but I really couldn't get any sort of sound I liked.