Use one of the many DPS spreadsheets to calculate which bow to buy. It's the only way to know for sure which is the bigger upgrade for you. As a point of camparison, however, I can tell you that a 900 DPS bow with 100+ Dex and 50%+ crit damage is probably going to be a better bet than a ~1050 DPS bow with no stats. So your intuition is correct, but you really need a spreadsheet to give you the answer you seek.
i just dinged 60 yesterday, but my budget wasn't much so i bought a 950dps 2hand xbow with 54% crit damage for 200k. If your going to be spending alot more then that i'd probably check the spreadsheet based on what you already have.
Because of the damage modifiers that DH's have along with SS. a high dps weapon with no stats doesn't always equal higher damage. A lower dps weapon with high dex, attack speed, and crit damage/socket could equal out to more damage.