The Marmot Aegis is not Gore-Tex, but it is as close as you get with out the big step up in price. $100 will buy you the baseline coated rain jacket from most of the major manufacturers: North Face Hy-vent, Marmot Precip, Mountain Hardwear Conduit, etc. Not as breathable, not as durable but waterproof at a reasonable price. Try to catch a sale and you can sometimes get Gore-Tex at $130-150, but it is tough!

If you are looking for good GoreTex Paclite Shell... you are going to be spending around $200 bucks at the least. You may be able to find one on sale somewhere for a little less but GoreTex for under a $100 bucks... I have not seen it from any manufacturers especially for in-line and current product. This Transition Jacket is made using Gore Windstopper which is different than GoreTex or Gore Paclite and you can usually find Windstopper for a little less. But, not that much less. If you need a good water proof shell check out the Typhoon Jacket from Mountain Hardwear for around $200 bucks. I think they are on sale now!