Amplifier choice for top end [midrange and tweeter].

Anyone still utilizing class A/B for their mids and tweeters? If anyone is doing so, are you running class D for your midbass and substage? I'm asking simply for the following reasons: I wanted to install a small system in my current commuter vehicle[Lexus CT200H] and utilize my old C2K amplifiers that are collecting dust; however, my vehicle will not allow for a full set up due to the size of the amplifiers because I'm planning on a false floor design to be housed within in the spare tire well. I need the spare tire and I want to keep everything as stealth as I can. I figured I would run the mids[Stereo Integrity M3] as well as the tweeters[Legatia L1pro] on A/B, then utilize class D for the midbass[Legatia L6] and substage[unknown at this time]. I really enjoyed my prior set up using the C2k's, but if I'm unable to do so due to space, I will forgo the idea, so I'm not looking to start a Class A/B versus class D discussion, I wanted to gather some thoughts on this set up. Thanks in advance for providing an opinion.

Setup would work just fine...not sure what the question really is. You've used all of the stuff before with success, so what would change this time?