I am in need of speaker wisdom... I have two older ADA 212 cabs with unknown speakers in them. I have a VHT head with a Randall preamp with various preamp modules in it and I play a classic/blues type music - everything from Pink Floyd to SRV to Led Zeppelin etc, etc. Anyway, I have been considering the celestion vintage 30's but due to the cost, I was wondering if there might be something equally as good or better for less - I may get two vintage 30's and pair those with two of another type to avoid buying four of them -- Advice please, thanks.