I made a topic and posted on some topics (and a few others) about the Amazon.co.uk and Amazon.com deals for the Ultimate Ears Triple.Fi 10 Pro's; I would pick them as there are currently no triple-driver IEM's, or even any IEM's, that can beat the discounted prices for the Triple.Fi's on Amazon, especially as their SQ is still regarded a s very good. At this discount price, its beats everything (ergonomics and fit notwithstanding):
Ultimate Ears Triple.Fi 10 Pro for £109.99
Ultimate Ears Triple.Fi 10 Pro via Amazon.com for $170.62
On that note, I own the UE Super.Fi 5 Pro's, which uses an almost identical body and shape to the Triple.Fi's. Due to my ears, none of the silicone tips could fit in my ears without discomfort, and the isolation was less than my Etymotic Research ER-6i's with the triple-flange silicone tips. However, the Comply T500 foam tips were amazingly comfortable and isolated far, far better than the silicone tips (my Ety's, as they are well known for this, are still better by a few dB).
Unfortunately, I lost the right earpiece of the Super.Fi's at the end of 2009, but I never forgot that seal. I have ordered the Triple.Fi 10 Pro's, and ordered with it the Comply TX-500 (with a wax-guard, which is very important for me).
So yeah, in my opinion over your other choices, go for it! You can spend the rest of your budget on getting a cheap yet well made headphone amplifier. I say go for JDSLabs.com cMoy BB v2.03 amps, as they are quite famous here on Head-Fi, been reviewed by the blog Headfonia.com, and are just plain AWESOME if budget if tight. The new one (v2.03) is also rechargeable if you want, and you can have either two non-rechargeable or chargeable batteries on top. You can even email John Seaber to see if he will make a 'tricked-out' custom version of the current cMoy BB v2.03 amp just for you. I have a custom built amp, the v2.02, from him before he graduated from his academic course back in 2009, and it sounds great! This custom amp was a replacement for another amp I bought from him in 2007/2008, the v2.01. I would also consider his C421 amp, but the cMoy v2.03 is very cheap for a high quality amp, and within your budget if you bought the Triple.Fi 10's at the discount deal price.
Hopefully this month I will either get a custom-built v2.03 or the C421's, but I am also considering to get some custom-mould tips for my Triple.Fi's this month too...
Unfortunately, and I rather be honest than not reveal this issue, and as I have written in my topic and on this topic, after I received my Triple.Fi 10's on 31.12.11 (early in the morning), they were already broken and defective upon arrival. However, please read the next few pages on both topics; though the IEM's were broken and I am upset, I could not be more happier that I at least got them from an amazing retailer who have an iron-clad brilliant customer service programme. As you read, you will see that not only are they paying to send a replacement for me by this week, but are also paying to pick up my defective IEM's. I have had help from Amazon.co.uk before, and though that was great, this is the BEST I have ever had from them.
So yeah, its sucky that it happened to me, of which I absolutely believe that this was a fluke, I do have at least a great silver-lining, and all I need to do is wait patiently again.
Up to you, but I would go with the Amazon deal.