Well doing a quick price comparison, the MXL 603 is on sale from Turnkey for around £140 ($200), the Beyer 901 £227 ($326) for one mike.
The Cascade X-15 only appears available Stateside, $399 (£277), plus import duty of 20%-30% most likely.
Will be using it for this kind of gig:
YouTube - steve noble,alan wilkinson,pat thomas,john coxon@ flim flam
(we get to hear some interesting stuff here in London!)
