Ive had a mark 5 head with a 4x10 and a 15, great sound for the money. The ninetys ones just looked dated, got an old 70's guitar head thats great (although broke at the moment) similar to the bass version. But have used both with a sansamp as they sound a bit flat otherwise. The 4x10 is a real back breaker, the 2x10 are still less than 200 quid and a lot lighter.