I have been using a Firstlight and a Skylight since they first came out under a wide range of conditions with good results. The Skylight is the original yellow epic fabric and is still going strong after some 200 nights.
My current Firstlight is the new BD fabric but I had many nights in the original one as well. I am still not convinced that the fabric "leaks" but condensation can be an issue and needs to be managed.
I much prefer the layout of the Firstlight over the Highlight for the full screen door, and the fact I can sleep with my head at either end. For me the length has been fine as a single shelter and I am 5'9". Double is doable but a bit cramped in inclement weather. As with any single skinned tent, mangaging condensation is key, along with having enough room to stay away from the walls.
I love the simplicity, small packed size, and wind resistance. I have had no problems with the fabric but I pay more attention when setting up. For me the best way is to stake the tent out and then insert the poles which can be done from outside the tent or while in the tent.
I spent several days pinned down in heavy wet snow and it performed well in the worst conditions for condesation in any tent design. I just had to wipe the walls down occasionally and knock the snow off the canopy. Once the fabric has wetted out and/or is covered by snow, it isn't going to breathe, not even e-vent. For the savings in price and packed size, I like the BD fabric better.
I have used a Bibler Fitzroy in the past and was very impressed with the Toddex fabric but it is quite heavy and bulky but bomber. The Eldorado would be nice but spendy – perhaps a used one? They show up on e-bay from time to time but will most likely be above your $300 limit.
In the end every shelter is a collection of compromises, you just have to pick the ones you are willing to live with.

