yeah, if the bullit is gonna be over a season away (by that i mean spring to late summer) i'd pick up a cheap fork. the MX series is a good one to look at for 100mm. this is one situation where a used fork on ebay might be a really good option. the better fork will help you build up confidence on your current bike, making the trasition to a monster FS rig a little easier. If you keep the fork you have now, you might miss out on improving the skills you will develop over a full season of riding.
I'd imagine you could get a used MXC for less then $150 since riding seasons are ending for some areas. $150 bucks over 6-7 months of saving isnt going to delay your bullit very much anyway. let us know what you end up doing.