Quoted from volcanodiver:
the fact that the cheap ones are similar to the output of inc bulbs is the major benefit. going brighter loses the heat reduction benefit, and looks like crap.
Let's not propagate myths here. The heat output of LEDs is overwhelmingly lower than incandescent bulbs, and the difference between a 1 LED bulb to a 2 SMD bulb is absolutely negligible. I have massive overhead LED spot lights in our home that are barely above room temperate at full output. The heat generated by a 2 SMD bulb is still negligible. In fact, most of the so-called heat would be generated by the resistors dropping the voltage to the forward voltage of the diode, so this really is a complete farce statement.
As for how they look, that's a matter of personal preference. It's very tough to compare the light throw of LEDs to incandescents because the direction of throw is focused and non-uniform. Frosted bulbs help offset this somewhat. Flat tops are very directionally focused and overall a poor use in GI, but decent in upward focused insert sockets.
The problem with these 300 packs, is that one size does not fit all. You first of all have different bulb types (wedge 555 or bayonet 44s), then the colors. Unless you're using 2 SMDs, yellow and orange LEDs product much lower brightness because of the semiconductor used. Thus, it's recommended to color match inserts (red/red, green/green, white/white) except for yellow and oranges where warm white or "sunlight" white is recommended.
You may very well be happy with 300 flat tops, but as a first go, I would recommend getting a variety of bulb types. I find myself using 1 SMD 5050s in most locations. I love the 2 SMDs that come with the newer Sterns, but feel they are too bright in older titles, even just as inserts. Again, it's a matter of personal taste and that's really your call. COMET also has 300 packs of the SMDs bulbs as well at discount.