I've used hollow fibre sleeping bags for years, but I'm getting more into touring (cycle to be specific) and want a lighter/warmer bag.
I've been reading up on bags but looking for a bit of advice based on experience. Typically I'll be touring Spring/Summer/Autumn around Scotland and Northern England hopefully up to 3 times a year, and unlikely to be camping when the nighttime temperatures hit freezing. I have a silk liner, a self-inflating thermarest-type mat and an Alpkit bivvy bag. My current summer bag weighs in at ~700g and would want it around the same weight. I usually wear base/mid layers to sleep in depending on the weather, but I'm neither a warm nor cold sleeper. My tent has an inner and a fly.
Are the budget bags worth it, or should I save up for something more expensive?
What manufacturers are worth paying for, and what are worth avoiding?
Would you buy a pre-loved bag or buy brand new?
Thanks, Lee