I have to agree with geo 100% concerning the Maui Sails booms. Over a year ago I bought the Carbon Wave 170-230, and in my opinion, the MS booms are truly benchmark products that were designed and engineered to be arguably the best booms available. Also, if you still have an older boom with some life left in it, an upgrade to the MS front end will definitely improve things tremendously. I retrofited my older HPL with the MS front end and the difference in performance is night and day.
Overall, you might pay a bit more to have a MS boom, but I think that it's worth it when considering such an important investment.