Mike,
I am no expert on various VMPS systems (I own RM40s and a good friend of mine here has RM2). There are also many factors that play into a decision like this, so a wise person gives this type of advice hesitantly.
How about this:
> If your SVS subs are going to be a part of your 2-channel system, then I would suggest there's no reason to get floorstanding speakers with deep bass extension.
So, do you opt for the 626R or the RM30 (sans bass)? Since I have never heard either, I can have no valid input as to which might be preferable in your system (and in your room). Nor would I know which might integrate better with your subs - but this must be an important consideration.
> If the SVS subs are not a part of your 2-channel system, then I know that I personally feel that bass extension is an integral part of musical enjoyment. That would leave the full-range RM30s and the RM2s.
As stated above, I have never heard the RM30s. I have no idea how their bass response measures up to that of the RM2. I also have no idea how improved they may be over the RM2 in other factors. Certainly, the RM2s are very, very nice speakers - particularly at their price point. If I had them instead of my RM40s, I would be very content for many, many years.
I'm sorry I'm not more help, but at least it's a start.
Good luck,
Kevin