By Esther Jang (staff@latinospost.com) | First Posted: Jul 30, 2015 10:00 AM EDT

After just four months of dating, Calvin Harris is reportedly planning to propose to girlfriend Taylor Swift.

According to Life & Style, via Hollywood Life, the Scottish DJ is willing to spend some serious cash on a 10-carat diamond ring, designed by Neil Lane.

"Taylor loves chunky rings, so he wants to go big," an insider revealed. "He's looking at cushion-cut center stones and is willing to drop at least $500,000!"

However, Harris is supposedly undecided on where he would pop the question and put a ring on it.

"He's on the fence because Taylor has so many favorite places," the insider added. "He thought of romantic Paris or Italy, but now he's leaning toward Nashville, where she has one of her homes."

Will Swift say yes? A source recently told Hollywood Life that the "Style" singer has no doubts the EDM star is the one and is so in love with him.

"Even though they haven't been together that long if he did ask her tomorrow she'd say yes, she's just so happy with him," the source claimed.

"Taylor doesn't think it's a sure thing, she's not that cocky," the source added, "but she has a really good feeling that they will end up together."

The feeling is clearly mutual - while calling into KISS FM U.K. earlier this month to promote his album and new single "How Deep Is Your Love," Harris gushed about his budding romance with Swift. 

"It's going absolutely fantastic," he said. "For me, it could be a lot worse and I'd still be insanely happy with her."

The "Summer" hitmaker then expressed his feelings towards all the rumors revolving his current relationship in the media:

"It's interesting because obviously there's different things written about it every day and even if we don't do anything publicly for a while, someone will make something up."

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