LEDs in the GI will always flicker and pulse like that at the "dim" levels unless you get a GI OCD board. that's why people turn off the "allow dim illumination" setting once they put LEDs in.
if you buy the cheapest bulbs, they will ghost noticeably on T2. non-ghosting bulbs will help that problem, and aren't that much more expensive.
i prefer to color-match the inserts, but that's a personal preference. i could talk all day about my personal LED preferences.
if you're really not into the LED look and you don't want to spend money, maybe just sticking with incandescents will work better for you. good luck!