I have a 35cm Black Togo Birkin. I lusted after the bag and basically ranted about it long enough that my hubby got the clue and bought me one. I love the bag. I love how I feel when I carry it. I just loved the entire experience of wanting it for so long, finally getting the call, driving to store frantically, the ceremony with which it was presented and being able to nonchalantly say "ok I'll take it" while I thought I might faint inside.
On the flip side, I have a hard time with it at times. I don't dare tell my husband how hard it is for me to carry it. It is a large bag and I am very careful not to hit walls, etc with it so there's a little bit of stress for me, because frankly if it gets hurt how can I possibly find another one quickly to replace it?? I am now on the hunt for a Kelly as I love the fact that it's smaller and has the shoulder strap option. If I were you I would seriously check out the Massai PM size (duna has one that is stunning). They are soft and luxurious, roomy, slouchy and elegant all in one. If you want more structure get the Kelly. You could get the softer Kelly with the inside stitching that is not quite as formal as the rigide Kelly.
I totally hear you about that oval on the Bolide. I really wish it didn't have that, but I love the rest of the bag.
If you desperately want a Birkin perhaps get a smaller one than the 35. My understanding is that the JPG is quite large and heavy so be careful. It's quite hard to decide especially in light that you can't just return it for a refund at the Hermes boutique so take your time and ask us all you need to ask.