i headphones are probably cheap, the mic is cheap.. not sure about the monitors... i have the Bx5a's and the only thing theyre lacking is bass.. so i just slapped a sub underneath the desk.. not the best idea but better than nothin.. i dont know about the Dx4's tho.. its a starter... youre stuff is gonna sound like shit if all you got is $1000 and you need everything from computer, to mixer, to mic, etc. I'd honestly stack a little longer and get around $1500 to $2000 if youre lookin for decent quality...
as far as recording goes... the blubird is a decent mic.. be sure to at least have a head surround... cuz those mics will pick up noise off the street. Definitely get your self a booth... it'll improve on delays and consistency in your vocal recording... remember.. YOU PAY FOR WHAT YOU PURCHASE... if you find studio foam for 99 center a square foot (or whatever the low price is).. dont get it... all that extra money will help you in the long run..
my boy got a rhodent1-a.. same shit that recorded Poetic Epidemic and Sykotherapy... and when i hear the recordings.. it doesnt sound anyhting like the quality of those cd's... so there is some shit you do to improve it (im not sure exactly what it is, get at anybody who you know got experience)...
quality aint the easiest bump in the road... but it could be overlooked IF you take your time.. hav ea good flow, delivery and somethin that youd actually want to listen to... i dunno how much recording experience you got.. but if you dont have too much.. take your time and develop yourself, THEN worry about quality