It really does sound like the K3003 is the way to go. Personally, I don't think the PFE 232 will cut it for you. It's similar enough the GR07, especially on the soundstage front, where it is still more like the GR07 than the K3003, that you may well be left wondering where the extra $300 went.
Well i was able to scrounge up the extra cash and managed to pick up the k3003. Ive had the past few days to spend with them. So far i am very impressed. Blown away, not so much, but very impressed. I think the law of diminishing returns takes effect here. I have had the privilege of hearing the W4 recently. While not my cup of tea, I have had a few moments here and there since then where I have had to ask myself if the k3003 is really worth the price tag or if would have been just as pleased with something a bit cheaper like the IE800s. I do have a couple of weeks left to decide before I am outside of the return policy, so I'll see how much I grow to like them.
Since Ive primarily been using the GR07 for such a long time and still own them I was able to A/B them. There is certainly a difference in overall clarity and quality, especially with the mids it seems. I will likely hold onto them to use when I jog since they still impress when I use them. I did, however, sell my EPH-100 to a co-worker.