There are plenty of entry level HTIB systems that would suffice IMHO, if you would like something of similar quality.
Way back in 2000 I purchased a Cambridge Soundworks DTT3500 (http://store.cambridgesoundworks.com/info/DTT3500). For many years it was not used.
Recently I purchased a flat screen TV and hooked this unit to the TV. My problem is that this unit only supports Dolby Digital and Dolby Surround. This means that content with a DTS track is not supported.
I would appreciate any advice on whether it is possible to replace the processing unit without having to replace the speakers and subwoofer.