Hi Marcus,
I just got my DXR10 and have spent a few hours of quality time with it... first impression is extremely positive and I'm delighted with it.
As for your concern about being "out-staged" by your band's other guitarist with his 2x12 V30's ABSOLUTELY NO WORRIES. 131db of sound pressure is extremely loud. If you need a chunky fat sound like when palm-muting or using low tunings, you may feel the dxr10 a bit lacking, in fact the dxr12 and dxr15 main difference with the dxr10 is that they are able to handle lower frequencies.
For the price I think the DXR 10 is really hard to beat as the perfect KPA companion, I haven't tried the CLR yet (I'm on the wait list and may score one in the near future) but being almost twice as expensive and the difference not being dramatic, although sensible (according to Ingolf's extensive side by side review) , when compared to the DXR10, You can't go wrong with it.
I advise you try to find some retailer or even a company that rents equipment, and test drive the different DXR's so you can find the right one for you.
Good luck with your choices!!.
Matt.