HI-FI NEWBIE NEEDS HELP!


I am new to the higher end of music listening, actually I haven’t started the listening part yet. I have just purchased an Emotiva XSP-1 pre and a pair of Magnepan 1.7i’s. My listening room is 14x14 but one wall is not closed off completely and there is an additional open space connected that is 8x9. My budget has been unexpectedly diminished more by having to buy new connectors and speakers cables. I just assumed I would be able to use my old RCA connectors and my 50’ spool of speaker wire I bought from Radio Shack 25 years ago. I will pause while you laugh....Anyway, the jist of it is is that I’ve got $2500 left for an amp. I need advice on what would be good for my setup? What would last the next 25 years, as I am a poor man with expensive tastes and will probably not be able to make any further upgrades. Would something used and older be out of date technically in 10-15 years? Could I consider something new that would be adequate for that price point? Should I go mono or two channel? Thank you for your consideration and reply.
widespreadpanic
I second the statement that more power is better than less power and that power on the used market is much more affordable than buying new. Buy more power than you need is my advice.
@willemj 

Thank you sir.  This forum needs more posters like you.  When I read the OP's first post in this thread I cringed at the idea that a person would spend money on wires before shopping for a critical component such as an amp.  I am so happy that I was able to secure an education in electrical theory and a working knowledge of electronics repairing and maintaining radio equipment in F-4 and F-15 fighters before my foray into audio components.  I have no doubt that with the stuff being marketed as audio enhancing technology these days that I have saved myself countless thousands of dollars that would have otherwise been wasted.  Keep up the good work.
Thank you sir. I hate to admit that there are moments that I want to stop, with all the abuse that gets thrown at me.