Biamping Classe CAP-100 with CA-150. Good Idea?

I have a CAP-100 and have 2 good offers on the CA-100(black) and CA-150(silver). Most probably I'll get the CA-150 since it has 50W more power on tap and looks better in silver colour.

My question is whether will it sound better in biamping? So far most of my audiophile mates told me that getting a high-end preamp like the CP-60 will be much better than running biamp configuration and only 1 guy recommended going with this biamping as it will sound better. Although I can afford the CP-35 but heard it's not worthwhile going for this low-end preamp.

Speakers are B&W CDM 1NT and source Sony XA7ES.

Any advice?
I'm confused about your question but I'm curious because I too have a CAP-100.

How do you plan to bi-amp with 1 integrated and 1 power amp?

I've often thought about using my CAP-100 as a separate.

Well looks like nobody in here seem interested in answering my question and I have to answer somebody’s question now.

Well it’s quite a common thing to biamp a stereo integrated amp with a power amp isn’t it? Use the integrated amp to drive the highs and the power amp to drive the lows of the speakers that have 2 sets of terminals at the back. You can only perform biamping with speakers that have biwiring option of speaker terminals such as those from B&W’s but not with speakers with only 1 set of terminals like those from JM Labs Utopias or Thiels. Arcam is common brand in promoting biamping with their amps.

Until then.
Pick up another CAP-100 and Vertical Bi-amp as I'm doing this with two Classe 25 amps and a CP-60 Preamp. I find this set up works best for me. As for the CP-35 Preamp, I would hold out and see if you can pick up a CP-60 or there is a DR-6 here on Agon, this is the model before the CP-60, both CP-60 and the DR-6 have seperate power supplies. Happy Listening!

Sorry to have bothered you.