This means you don't need to think about a processor yet.
I beg to differ. To clarify: to get ANY analogue source into DSPs will require a processor of some sort capable of doing A2D. In the Meridian world the entry level would be the 562 (second-hand for �150-�250, depending on model, condition and whether it has the phono card and DAC) while the current production component would be an AC200. Other (lesser

) A2Ds may be available from other manufacturers.
Now we have an idea of budget, I agree that DSP7200s are the optimum (current production, latest s/w capabilities and connectivity, hopefuly in line for future upgrades). Their on-board environmental tuning offers a range of mitigations for room effects. The connectivity is slightly hampered by only having one SPDIF input, plus one speakerlink input. The processor options above resolve that issue supporting all the OPs source needs, however...
With that budget, in the current processor market, I would go for a 568.2 as it is economic, offers upsampling, has multiple analogue and digital inputs and is a route into multi-channel including DTS and DD which are not only relevant for films. Not sure of its A2D quality; it may be limited to 16/48 but the internal upsampling deals with that.