Excellent forum, its thin, light weight, fat SPL 10 "broadband.
I used 4 for about 2 years.
I also PS8, PS10, PS15R2 I had low end stuff before too.
What I like: the weight / size / power / quality
Value for money, all depends on how you need it. For only one pair, buy a 4X1 or 4X4 is NXAMP climb the damn note. If you use multiple pairs with substance, immediately because it is more profitable not necessarily require additional amplifiers.
The 4X1 is very powerful for PS10R2 better if the bridger need some level (but more than 2 channels), otherwise the 4x4 is much better. That said the 4X1 just to make coffee concert marriage normal size, etc.. For the big rock that spot with subs or large clubbing will take the 4X4.