Thats a good tank for discus, but angels like taller tanks. Today I saw about 6 angels in a taller tank, I have never seen an angel so big! they grow quite tall and I would get a taller (Not bigger) tank. But if you reconsider discus or silver dollars or other flat fish can be ok in that tank, if flat fish is what you are looking for. If you just want angels then probably a higher tank would be needed. Then again I suppose angels wouldn't die in there...calling angel experts?
Angels do preffer a tank with a 20"+ depth but i dont think 2" is going to make that much difference and the length more then makes up for it.
Very nice looking tank BTW