Richard - For straightforward audio 2 in 2 out and midi in/out, something like the Alesis IO Dock looks to fit the bill.
The issue I have is getting an audio interface with 4 outs that is known to be compatible.
The RME Fireface has more than 2 outs and Is noted as a supported interface but the spec and price is more than I want. The hundred odd quid and the spec for the Tascam solution would be ideal if I knew for sure it would work.
Still hoping someone can help with this.
Cheers
Stevo