any probs with an 05 rm125 or 05 yz125

i am geting a new bike and have been doing a ton of reading up on rm125s yz125s and yz250fs. i have ruled the 250f out as a bike that i may buy after reading about the need for frequent oil changing and the need to keep everything in spec much more than a twostroke. Now i am still debating between an 05 rm or an 05 yz so now it comes down to perfomance. So to wide this down, i would like to know from those of u that have ither of these bikes what problems if anyhave u been having. Thank you.