What amp should I buy?

[captcrash]

I am looking for opinions on what amp or amps you think that would be best for me. I do not know much about car audio but am trying to learn as I go. I am much better with engines. The car is a 69 Camaro street car. It will be a weekend cruiser. Here are the parts that I have already:
Kenwood KDC-X396 deck which has (22 watts RMS/50 peak x 4 channels)
Alpine Tweeters 100w rms 300w peak
Kenwood 4in in dash 20w rms 120w peak
2 JL Audio 10inch subs 300w RMS 600w peak

I may use another pair of 4" or 6x9s depending on room by the back seat.

I am looking to buy an amp but I don't know if I would be better off with a 5 channel amp and power the sups the tweets and the other set of speakers in the back seat with it, or should I get a mono amp for the subs and a 4 channel for the others. I would like enough power to where there is no overheating issue. I was looking at the Kenwood Excelon XR900-5 or the JL Audio XD1000/5v2 but I don't know if it is worth twice the money.
Thanks,
Brain