I think the 4,000's replaced the 1,000's. If they are anything like my 1,000's they are awsome!
My 1,000's are a "Euro Beam". Doesn't throw the beam as far as the pencil beams but it puts any head light highs, including my Hella Rally "DOT illegal" H4's I had in my Supra to shame. My neighbors hate me. I have 440 (110watt bulbs in the 1,000's and 55 on each of the stock highs) watts of high beams now. LOL