Wow ,matter over $$$$....great questions.I was just thinking this myself....
Let my start with this.....Springer or air.......Great Springers are all about the same price...say under $600....and you have many choices,narrow it down to made in Germany or England and leave it at that...
Air....OK I have a RWS850 .22,I get over 80 strong shots off a "can"...the rifle is accurate and powerful enough to be a great under 50yd,hunter..The more compact Gamo Urban is a Great beginners rifle...also easing to hand pump and change cocking level from right to left.....and the Crosman Challenger PCP .
I love pistols.....The PCP Prod can be great and so many options for it,like make into a carbine....the Crosman 1720T also the 1701 are both super accurate,not that expensive and Fun to shot..
Scopes.....now that is a "can of worms"....in that the differences in peoples perception can be so magnafied,lol
I want a simple light scope that has clear vision for the ranges I will be using it for.
I notice that a lot of the newer brand scopes are heavy...and a lot of them are made in the same factories with different names....I like Leupold,Burris the higher end Bushnell and Nikon......ok a really good deal..Simmons Aetec scopes.....some of the Discovery scopes,but they are heavy and crowded.
Actually this is my hobby for the last 50 years,getting the best for my needs for my money....have plenty more suggestions,but realize I am just an opinion based on my experiences.
My best advice in such matters,Form your own opinions based on "long" term experience from what you have learned and from other people advise that Fit into your own needs.