Age: Dotel is 30, Rhodes is 34 - the same age as Rivera and Percival and 3 years younger than Smoltz. He is not getting any younger, that's one thing that you got right.
Let's put aside last year - Rhodes had an ankle injury but he is supposed to be fully recovered.
For 2001 and 2002 Dotel had a WHIP of 1.044 (not bad), Rhodes had a WHIP of 0.840 (that my friend is lights out).
Rhodes has been hand picked by Beane, who has had some success in picking closers, and has been given a 3 year contract specifically to close.
Dotel has been given nothing. He goes into spring training as the front runner to win the job. He's not exactly up against Bill Caudil but has to beat out Brad Lidge (who is 27, age seems to be a big thing with you - that is 3 years younger than Dotel - now seems to be the appropriate time to point out that Dotel is not getting any younger either - Lidge, on the other hand, expects to be 26 next year
) who had 97 Ks in 85 IP last year.
The Dotel bandwagon is in top gear and is picking up even more momentum. You don't get value with the hyped players. Value is found with the Arthur Rhodes and Mike Hamptons of this world.
I think that Dotel will win the closers job in Houston and I think that he will have a fine season. I have him ranked ahead of Rhodes on my board but not by 12 rounds (the spreads that I have seen). If you are looking for value and to win your league - get off the Dotel bandwagon and look to pick up cheap saves with Rhodes. But what do I know?