Some other considerations that haven't been addressed, rope construction, hand- how does it tie and hold a knot or hitch, heat tolerance.. weather usability and dexterity- how comfortable is it to grip at the business end? There is already a wealth of info on these attributes so I wont go into details.
What I will say, the type of trees you will be working in /on will have the biggest influence on ropes and lengths required. Here in the interior of BC we get fewer broad trees, we aren't in the hardwood zone though they do exist here, so most of our trees are conifers that range in height from ground level to 200'. Obviously, a 150' hank of rope will be all but useless in a 200' tree and very seldom is only 1 rope employed at a time. So for our purposes, we not only have several lengths available of the same type, but we have different diameters available because as we descend our wood gets heavier.
We may need to connect to our bucket truck to give some muscle to a pull job? can't use a climb line for that, so 3/4' is employed.
So it may be worth buying a 600' roll of commonly used 1/2' Stable braid and trimming it to say.. 300' 200' and a 100' length, because it is a versatile rope that can be used for all kinds of light to medium weight wood. Same with climb line, if you used a double rope method a standard 150' hank is only good for 70' with knots, limb radius? safety tails? etc. So for me 150' is mostly useless I prefer at least 200 feet, even for srt.
Your lines compatibility with devices is also important, too coarse and it will saw away at your device. Too skinny or fat not so good either!
As for manufacturers, they are all pretty good these days. They all have specs that need to be met so it's best to stick with what you like. Over the years you will try different ones and some won't meet your requirements. Do expect to pay a lot of money on ropes and do respect their limitations! And DON'T EVER tie a climb line to a vehicle for any reason unless the vehicle is disabled and the keys are in your pocket. Dont EVER used a climb line to rig.. period. And never let anyone STEP on a rope.