In reply to imahuman118:
It sounds like what you're after is an all-round mountain boot, more than a higher end technical model.
Something in the B2 ballpark would generally be more comfy for walking in than a B3, and should work for you up into the lower winter climbing grades. Exactly how hard you can happily climb in this sort of mid-range boot will depend partly on how big your feet are (larger feet = more leverage on the sole = more flex, which you don't generally want on steeper ground).
As you've mentioned, you do also need to consider insulation; some all-round mountain boots are more summer alpine-oriented and likely to be a bit chilly in a Scottish hoolie.
That said, if you find something that fits well that just happens to be more along the B3 lines then it will do for easier stuff, could prove warmer, and will also future-proof you in case you are bitten by the winter climbing bug and want to progress onto harder routes in future.
Bear in mind that the B rating is just a rough guide to a boot's rigidity and capability. Some brands don't even refer to B-C ratings for boots and crampons.
If you're buying crampons as well then you need to make sure in the shop that they fit the specific boot you've chosen, since not all makes/models will be an ideal match.
And as for boots, there's no substitute for trying loads of pairs/makes on before making a purchase. The best way to do this is to go to a town that has a lot of outdoor shops in close proximity, since each shop is only likely to carry a few of the brands available. Go everywhere and spend hours trying each possible pair on, several times if necessary. Head for somewhere like Ambleside, Keswick, Aviemore, Llanberis or Covent Garden...
This review of several mid-range models might be a useful starting place:
https://www.ukhillwalking.com/gear/footwear/mountain_boots/all_round_b1-b2_...