Well i dont know about the BA115HPT but I have a BA115 and when I first got it I was really excited about having an ampeg. It sounded awesome and I was totally stoked. Then the problems started setting in...may just be my luck but first off its not NEARLY as loud as an amp with that price tag/ wattage should be. I was really dissappointed the first time I played it in practice. ALSO, major problems with hissing and a problem with buzzing that just won't go away. Then again, I have really taken mine to a LOT of gigs (lol when i bought it i didnt consider the fact that I would be getting gigs more often in teh next couple of years). I would HIGHLY reccomend this amp to practice with, just as long as you dont move it around too much or set the volume above five. Seriuosly, Ive had a lot of experience with the BA115 (I know two other people that had them also) and honestly, for $300 you are getting a really nice practice amp but I REALLY wouldn't gig with it.
ALSO, be careful with recording from it, as the direct out has broken and caused my amp to go silent TWICE now, with two different audio guys. If the PA starts crackling and its your bass amp....unplug it and start praying your amp will still work!