New Maggie 1.7 owner, amp ?

I'm new to buying better audio and I'm restricted by a budget. My purchases have to be well thought out. I was interested to see Bryston has a long warranty. What other amps have these long warranties?

Also I may want upgrade later on and I want what I buy to have a decent resale value. And if I buy used what do I look for from a seller?

I now see I need a pre-amp and a CD player, i'm guessing my Blueray players don't cut it as a CD player. Also is there a preamp that allows Xm & has input for a ipod dock?

Okay so far it's between Bryston 4B or a NAD C375BEE. Not really sure to what is the difference between the C375BEE & C275BEE. I have to say I'm leaning toward Bryston, even though it's more expensive.

Energizer, so you buy your cars without warranties? I guess I don't get it. Having a long warranty seems to be the icing, definitely not the cake but yes the icing.

I can see I have much to learn.