Let me offer you a definitive course of action:
- You should buy a Summar.
- You should then sell the Summar.
- You should sell your Summaron.
- You should then buy a Canon 35/2.
- You should buy another Summar, in nickel this time.
- You should sell your CV 21/4.
- You should then buy a Super Angulon.
- You should then sell the second Summar.
- You should then sell the Canon 35/2.
- You should then buy another Summaron, but a 35/2.8.
- You should buy a third Summar, coated this time.
- You should sell your Leica III.
- You should buy a Leica M3.
- You should then sell the second Summaron.
- You should buy a third Summaron, this time with goggles.
- You should sell the collapsible LTM Summicron.
- You should then buy rigid M-mount Summicron.
- You should sell the third Summar.
That should get you through the next two years or so without having to think about gear. Now you can go out and shoot without the difficult questions of what gear to buy and sell interfering with your concentration.