So, I have been living with the Speedwoofer 10 and a pair of the Cg4's for a while now and can honestly say that they are great speakers in all respects.
After some minor adjustments to the crossover, output level, and positioning, the sub integrates seamlessly! The volume is set between 1/4 and 1/3 and is room filling with movies, and more importantly for me, music. The crossover is set right at about 105hz. When in my listening position the low end truly sounds as it is coming out of the rather small CG4's. The CG4's sound very smooth and image VERY well. I have always been a tower speaker kinda guy and have always been skeptical about satellite/sub setups for music, but man these things do it all quite nicely. I listen to every thing from classical to metal to hip hop (and everything in between) and it all sounds great coming from the RSL setup. I have cranked these guys up quite loud and they handle it well. The sub is certainly no slouch. I prefer it to my friends SVS PC ultra cylinder sub. The SVS does dig deeper, but the Speedwoofer is much more musical and well rounded to my ears. The remote sub control is soo convenient. I have always hated having to get up to adjust the sub only to sit back down and get back up to adjust it again. Different movies and music have different levels of bass out put and I like to be able to quickly and easily adjust while sitting right where I will be listening from. There is no boxy boomy sound to the Speedwoofer either, it's sound is deep, clean, and smooth to my ears, I Love it.
While I do have a rather small living room, from what I have heard, I think these would fair quite well in a larger room and still sound sweet. In fact, the couple of demonstrations I attended before buying them were in much larger rooms and they did great. The size and finish is very pleasing to any one who may not be into speakers in their decor (all of my neighbors, ladies included, comment positively on their looks and sound).
Overall, for the build quality, sound quality, customer care and service, and last but not least price.....I would find the RSL's very hard to beat.