Tyranid Army 1500 - 2000

[Charon]

Hi everyone...

I toy with the idea of creating a Tyranid Army as my next project.
I just have absolutely no idea what to take. I really like the tyranid stories of massive armies of gaunts with synapse sprinkled in an a few monsters to do the hard hitting.
I came up with various lists but not one of them seems valid when playing vs IG and similar shooty armys. I always come back to lists of a few big monsters with a few gaunts to fill in... I dont like this but it seems the only way to construct a viable army nowadays.
Any ideas how I could field as many models (or more) as the typical infantery heavy IG while keeping enough punch to not get tabled in round 3?

[Halollet]

My first thought

3x Trygon Prime + Endless Swarm Formation

Having 3 units of gaunts pouring out into your opponents backfield every turn while your heavy hitters move up!

What do ya think?

[Charon]

thats over 800 points in monsters (without any biomorphs) and you are not even able to deal with walkers or tanks properly.