In a Quandary

[twistedlefty]

Sprint customer since 94-95 great plan upgraded/changed to in 2004.
Family 550(SM) Talk Plan: $59.99/month
3 phones, touch pro, samsung highnote, samsung M320
2 with unlimited data and texting, free picture mail, unlimited nights/wkends after 7pm.
with all this i am paying roughly $100/month

i wanted to upgrade to an android phone such as the evo 4g when i became eligible for my $150 discount but i would lose my plan and with the extra charges of $10 per month it would bump me up to around $140/month.
and this is without counting the cost of the evo minus my discount.

retentions offered to let me upgrade to a Touch Pro 2 and i could keep my plan and everything the way it is except that i would have to pay the additional $10/month smartphone fee.
i just started trying custom Roms on my TP and it has of course breathed new life into my TP and i could probably hold out longer and see if things change for the better (new plans, phones, etc.) but the offer on the TP2 will expire soon and I'll need to make up my mind. btw eating the extra cost per month on the evo upgrade/plan change,etc. is out of the question as i cannot afford it in my monthly budget.

any ideas suggestions, opinions, food for thought?