This is for mo-town, and if history is any idication they don't take to kindly to things like that. They want everything perfect when they receive it.
Then you don't want to use any kind of conversion. We've used several including MSTA itself for attempting conversions and it just doesn't convert cleanly. There's always a something.
We do the work in whatever format they client desires the end product. If it's autocad, use autocad, if it's msta, use msta.
Anyone remember Usta?
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But to answer your question about images, Msta does images reasonbly well, but the best bet on attempting to convert them out of ACAD is buy MSTA V8 and open the DWG's straight into MSTA.
Bentley used to provide evaluation versions of their program free. It ran for 20 min. and then ended, so you had to work in 20 min intervals. If you can still get a copy, that would be a great way to test the conversion quality.