You sound like you're very sensible and know yourself in many ways very well. So, firstly, is this bag for you or your husband? If he's the one paying (to give you as a gift) then perhaps there's a compromise to be had, otherwise I would go with your heart, your head and your experience.
1. New vs used - My husband thinks that I should buy directly from the store even if it takes time and not settle for used bags.
If what you want is at a resellers this minute or isn't available via the store (discontinued leather, colour etc) then I'm with you. If you are being offered something equally comparable and desirable at your store then of course consider the store's offer first.
2. Size 30 vs 35 - I am 5 2 and petite, I like the look of 35 cm birkin as it fits my laptop and can be used for travel but think the 30 cm will be best for day to day use considering we are not traveling or going to the office these days.
I think a 30 may look more proportionate and will be lighter, but we need what we need (first rule of bag shopping). Hopefully, the pandemic won't last forever and a B or K are for keeps (or at least longterm) so thinking about life under lockdown may not be so appropriate in this case.
3. Color Nuetral or Bright colors - My husband thinks that if we are spending over 10k, we should buy something that stands out and I agree with him when I see Rose Pourpre or Rouge Casaque or Malachite, etc. But I love the look of a black Birkin with ghw as it is very versatile.
No disrespect to your husband but you and he sound like you want this bag for different purposes. Him for investment and status and you for daily wear.
4. Style Birkin or Kelly or both - Should I buy a Birkin or a Kelly. Eventually, I know I will buy both but not sure what would suit my lifestyle more. These days I am using my Gucci Marmont belt bag and Chanel WOC's the most and don't use the other bags.
Buy one and see if you like it first. It also depends on the size too, a K 25 is nothing like a K 35 or 40 never mind a different bag model. I like the K (32/35) and never bothered with a B, I seem to grow out of the desire to own one (although HAC different story). As a tote, I prefer the GP and the DS and a host of other totes and hand-helds. Again, don't fret over the 'now', the
only bag I've used regularly for a year is my Evie 29, but if I saw an amazing H bag that I'd always wanted at a good price I would still jump now and just put it on top of my piano along with all my other amazing but sad bags until we are 'free' again.
Unless you are getting both together as an all-in price with a sizeable discount, I'd hesitate to buy bag multiples all at once. Buy the one you most want first. Then you can think about the other.
