Depends what sort of power range you want, for me the 2072 works well on my Godzilla engine & provides a good range of power with plenty down low & still a very good top end, it gives good fuel economy on my engine as well but its not a standard engine so not sure if it would be the same without the mods.
The Werks 2058 is a good option with good overall power, slightly less bottom end than the 2072 & a good top end as well, works on most engines & is good on the GO engines, also provides good fuel economy. (read about 2058 in this thread, haven't used it myself but would like to try it)
Not really sure about power band of the 2103, if it was similar to the 2058 then it would be alright.