It sounds like you have a plan! I would sell the ones as you stated you wouldn't know were gone if someone came and took them away. I would def. sell that red epi speedy for sure since it doesn't suit your needs(too small opening).
How about taking pictures like you said of the ones you feel in conflict with. Get them in a nice group shot, a really good picture, and then frame that picture and put it on your bedroom wall or dressing room/closet? Then get rid of those bags and you will feel very liberated to not be 'hoarding' them which it sounds like this bothers you. this way you still get to look at those bags w/out having to keep them! btw I don't think there is anything wrong w/ having bags you don't use and being a collector for those that do this.
Right after I got my first LV bag, this past Nov. of '06(since sold it) I took a picture of my bags(I had maybe 7 of varied brands, Fendi/
prada/burberry,the mono speedy/
gucci) all lined up. I have NONE of those bags now, but I really love looking at that picture and going down memory lane, the gucci charms was so pretty and I knew the woman I sold it to from ebay. In fact I emailed her to let her know I was listing it since she was an orange lover and it had apricot trim.
I'm excited to see your pictures after you take them.
oh and btw I'm in the opp. boat of trying to build a 'collection' (I have only 4 bags) and my dream is to have 10 bags. I told myself that 10 is my limit that I will keep and then when I get the 11th bag one of those 10 must go. So that's my plan. For you, it sounds like 20-25 is your comfort level, I'm wondering how many bags you have, lol, would that be including pochettes in that 20-25 you'll keep?