What is your graphics card?
is 650w sufficient?
Here is a handy chart:
http://www.realhardtechx.com/index_archivos/Page362.htm
You will usually find that the next stronger psu costs only a minimal amount more.
I have no problem overprovisioning a PSU a bit. Say by 20%.
It will allow for a stronger future graphics card upgrade.
It will run cooler, quieter, and more efficiently in the middle third of it's range.
A PSU will only use the wattage demanded of it, regardless of it's max capability.
Full modular power supplies will usually cost more.
Some are partially modular with necessary connectors like the 24 pin connector fully attached and optional cables not attached.
A non modular psu is ok with me.
There is usually room in your case to tuck unused cables out of sight.
Next, buy only a quality power supply.
It is a long term investment which will be good for several future upgrades.
Knowing nothing else, look for one with a 7 to 10 year warranty.
Here is just one of many psu quality tier lists:
PSU Tier List 4.0 rev. 14.8 (END OF LIFE) Last Update: 27-07-2021 Legend : Gray - EoL/obsolete and/or otherwise not recommended for purchase. Green - small form-factor (gold and blue colors are disregarded due to scarcity of SFX PSUs) Gold - best units in the tier (includes requirements for blue ...
linustechtips.com
Of your choices, I would pick the Seasonic GM-650:
https://www.newegg.com/seasonic-focus-650-gold-ssr-650fm-650w/p/N82E16817151202
Note that the 750w unit is only $10 more.