That's the choice I've been given. 1 month into work at a small business with 1 well used 2008 r2 SQL Server (average 9k transactions/sec. with sustained periods of 20K mainly due to BizTalk EDI. 3 db's around 100 GB, 12 smaller ones, Hyper V environment not efficiently configured (1 lun to rule them all)
Which would you choose? What other questions would you ask before deciding? (we use SQL server very generically).